java.lang.ClassNotFoundException: org.apache.spark.sql.SparkSession$ . Please Help!!!!!!!

[shyla deshpande]

object App {


 import org.apache.spark.sql.functions._
import org.apache.spark.sql.SparkSession

  def main(args : Array[String]) {
    println( "Hello World!" )
      val sparkSession = SparkSession.builder.
      master("local")
      .appName("spark session example")
      .getOrCreate()
  }

}


<properties>
  <maven.compiler.source>1.8</maven.compiler.source>
  <maven.compiler.target>1.8</maven.compiler.target>
  <encoding>UTF-8</encoding>
  <scala.version>2.11.8</scala.version>
  <scala.compat.version>2.11</scala.compat.version>
</properties>

<dependencies>
  <dependency>
    <groupId>org.scala-lang</groupId>
    <artifactId>scala-library</artifactId>
    <version>${scala.version}</version>
  </dependency>

  <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-core_2.11</artifactId>
      <version>2.0.1</version>
      <scope>provided</scope>
  </dependency>
  <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-sql_2.11</artifactId>
      <version>2.0.1</version>
      <scope>provided</scope>
  </dependency>

  <dependency>
    <groupId>org.specs2</groupId>
    <artifactId>specs2-core_${scala.compat.version}</artifactId>
    <version>2.4.16</version>
    <scope>test</scope>
  </dependency>
</dependencies>

<build>
  <sourceDirectory>src/main/scala</sourceDirectory>
</build>